---
title: 'Senior Backend Engineer, Developer Platform at Offchain'
canonical: 'https://feeny.ai/job/senior-backend-engineer-developer-platform-offchain-remote-4ghx02b81w41'
type: 'job'
last_seen: '2026-09-09'
---

# Senior Backend Engineer, Developer Platform at Offchain

- **Company:** Offchain
- **Location:** Remote
- **Employment:** full-time
- **Work type:** remote
- **Posted:** 2026-07-07
- **Last confirmed live:** 2026-09-09
- **Apply:** https://jobs.lever.co/offchainlabs/ea44f500-981b-4d7e-9203-3ada1dc12365

## Job description

At Offchain, we aren’t just building products: we’re leading a movement.

As pioneers in blockchain scalability and security, we're at the forefront of transforming how the world interacts with decentralized applications. We're laying the foundation that will define the next generation of digital commerce, governance, and human interaction. This involves tackling real-world challenges that come with scaling blockchain technology, without compromising on its core principles: decentralization, security and transparency.

At the center of this vision is our people. Our team is made up of thinkers and doers that embrace new challenges and seek solutions that push existing boundaries. If you’re energized by solving unprecedented problems, and believe in the role that decentralized systems will play in creating a more equitable digital future, then we want to hear from you.

Why Offchain?

Offchain is setting the pace for the entire Ethereum ecosystem. We built the Arbitrum stack that powers Arbitrum One, the most widely adopted Ethereum scaling solution that exists today.

Arbitrum’s ecosystem is undergoing tremendous growth with hundreds of projects and dApps on Arbitrum One today. Over 100 different teams have used Offchain technology to build their own Arbitrum chains. Major players in the space, Robinhood, BlackRock, Ethena Labs, Securitize, Aave, and Apechain are all using the Arbitrum stack.

Arbitrum’s thriving ecosystem wouldn’t exist without our advanced technology stack. Arbitrum, Prysm, ZeroDev. These aren’t just product names. These are tools that are actively reshaping what's possible on Ethereum and advancing its core infrastructure.

To top it all off? We’re backed by $124 million in funding. We’ve demonstrated consistent execution with billions in secured value, thousands of supported projects, and infrastructure processing millions of transactions seamlessly.

The Role: The Developer Platform team builds KMS, the key-management and signing service behind ZeroDev's embedded wallets (smart-account / account-abstraction wallets that app developers drop into their products). It is non-custodial: end users control their keys, and the service orchestrates secure creation, authentication, and signing on top of a third-party signing provider. This is security-critical infrastructure, externally audited, with a high review bar. You will own backend services and the cryptographic recovery and trust-model machinery around them on a small, high-ownership team, and help grow the platform from interactive consumer wallets toward programmatic and automated signing and programmable transaction policy.

What you'll work on:

- Go backend services that broker wallet creation, authentication, and signing at scale.
- Key recovery and the committee trust model: distributed key generation and secret sharing that keep the service non-custodial, with recovery authority split across independent committees so no single party ever holds a user's key
- Trusted Execution Environments: reconstructing and operating on key material under hardware isolation and remote attestation
- Authentication and signing-provider integration: the user-facing auth methods that gate signing (passkeys / WebAuthn, OAuth, OTP, sessions, 2FA), and integrating with a third-party signing provider (authorization and policy flows, scoped credentials, quorum / consensus approvals)
- Security review and hardening: writing design docs and decision records, working directly with external security auditors, and turning a high review bar into shipped code
- Production operations on Kubernetes: observability and alerting, secrets and certificate management, on-call, and the compliance controls the domain requires (sanctions screening, PII-safe handling)

Who you are:

- A strong backend engineer who has shipped and operated production services in Go (or an adjacent systems language and is eager to go deep in Go)
- Security-first by default: you reason about threat models, blast radius, and key custody as a habit, and you write code that holds up to security-critical review
- Comfortable with applied-cryptography fundamentals (public-key crypto, signatures, key management). You do not need to be a cryptographer, but you can reason about it and learn fast
- Solid on distributed systems and API design: idempotency, failure modes, and clean service boundaries
- Operationally mature: Kubernetes, observability, and incident response are not foreign to you
- Clear written communicator (design docs, decision records) who thrives in a collaborative, review-heavy culture

Nice-to-have

- TEE experience (AWS Nitro Enclaves, Intel SGX / TDX, or similar): attestation, enclave key handling, reproducible enclave builds
- Threshold cryptography / MPC in practice: DKG, FROST or other threshold signatures, verifiable secret sharing, resharing
- Account abstraction: ERC-4337, EIP-7702, smart-account or embedded / non-custodial wallet experience
- Built on or integrated a custody / signing provider (Turnkey, Fireblocks, or similar), or built one
- HSM / YubiKey / PIV / secure-element integration
- Been on the receiving end of a third-party security audit and driven the remediation
- WebAuthn / passkeys, OAuth / OIDC, and the Go crypto ecosystem

Perks:

- Remote-first global workforce + NY office
- Professional reimbursement program (facilitates industry conference attendance, certifications, and more)
- Medical, dental & vision coverage (US + some other countries)
- 401k retirement plan + company match (US only)
- Wellness stipend
- Home office set up / ergonomic equipment program

Attention Offchain Job Seekers:

This role cannot be performed in California, or Colorado.

Please be advised that there has been a rise in fraudulent recruiter activities, particularly within the Web3 space. If you would like to confirm whether someone is an Offchain employee or the legitimacy of an offer you received, please email jobs@offchainlabs.com

At Offchain, we are committed to building a welcoming and supportive workplace for all employees, regardless of their background or identity. We strive to create an environment where everyone feels valued and has an equal opportunity to succeed and thrive. We encourage candidates from all walks of life to apply and join our team.

## About Offchain

## Company Overview
- **One-liner**: Offchain Labs is the research and development company behind Arbitrum, building the foundational infrastructure for scaling Ethereum and enabling the programmable economy.
- **Entity Type**: Private (Series B; $124M total funding raised)
- **Headquarters**: New York, New York, United States (additional office in Princeton, NJ)
- **Founded**: 2018
- **Founders**: Ed Felten (Co-Founder & Chief Scientist), Steven Goldfeder (Co-Founder & CEO), Harry Kalodner (Co-Founder & CTO)

## Core Business
- **Primary industry**: Blockchain infrastructure / Ethereum scaling (Layer 2 rollups, consensus clients, developer tools)
- **Target customers**: Developers, enterprises, and protocols building on Ethereum; B2B, B2D (developer-focused), and institutional partners
- **Mission or purpose**: Build the infrastructure behind real adoption of onchain technology, making Ethereum scalable, secure, and accessible for global finance and decentralized applications.

## Products & Services
- **Arbitrum One**: The flagship optimistic rollup that dramatically reduces transaction costs and latency while inheriting Ethereum’s security. (SaaS / protocol)
- **Arbitrum Orbit**: A modular framework allowing any team to launch its own custom, sovereign rollup chain. (Protocol / platform)
- **Stylus**: A multi-language smart contract environment (Rust, C++, and Solidity) for high-performance dApps on Arbitrum. (Developer tool / runtime)
- **Prysm**: The leading Ethereum consensus client (originally created by Prysmatic Labs, acquired in 2022) that powers Ethereum’s proof-of-stake network. (Infrastructure / software)
- **ZeroDev**: A modular smart wallet and account abstraction toolkit (acquired in 2025) enabling developers to build programmable, gasless user experiences. (Developer SDK / API)

## Market Standing
- **Valuation/Market Cap**: Not disclosed (private company)
- **Key Metric**: Total funding of **$124M** (including a $100M Series B led by Lightspeed Venture Partners in August 2021). Estimated annual revenue per LinkedIn is **$3.2M** (likely conservative).
- **Notable Investors/Partners**: Lightspeed Venture Partners, Polychain Capital, Ribbit Capital, Redpoint Ventures, Pantera Capital, Blockchain.com
- **Growth Signals**:
  - Headcount grew **44.4% YoY** (from ~100 to **150+ team members** across 20+ countries)
  - Processes **2.3M+ daily transactions** on Arbitrum
  - **1,000+ projects** launched on Arbitrum
  - Acquired Prysmatic Labs (2022) and ZeroDev (2025) to expand product suite
  - Active hiring: 19 open positions as of August 2026

## Competitive Advantages
- **Research-first pedigree**: Founders are Princeton-trained computer scientists (Ed Felten is a former White House Deputy CTO) with deep expertise in cryptography and distributed systems.
- **First-mover & ecosystem dominance**: Arbitrum is the most widely used Ethereum Layer 2, with the largest TVL and developer activity in the space.
- **Full-stack infrastructure**: Covers execution (Arbitrum), consensus (Prysm), and user abstraction (ZeroDev) – a rare integrated stack.
- **Security-first culture**: Emphasis on formal verification, audits, and enterprise-grade asset safety.

## Strategic Focus
- **Scaling Ethereum globally**: Continuing to improve Arbitrum’s throughput and cost efficiency.
- **Developer empowerment**: Lowering barriers with multi-language support (Stylus) and modular rollup deployment (Orbit).
- **Enterprise & institutional adoption**: Building compliant, permissioned-ready infrastructure (Prysm for staking, ZeroDev for wallet services).
- **Ecosystem growth**: Incubating projects and partnering with financial institutions to bring real-world assets onchain.

## Why Work Here
- **100% remote culture** that is “intentional, not accidental.” Employees report deep focus, high-quality output, and schedule autonomy.
- **Elite technical environment**: Work alongside leading researchers, Ethereum core developers, and cryptography experts.
- **Meaningful impact**: Every team member contributes to infrastructure that powers billions in value and millions of daily transactions.
- **Culture of trust and growth**: Employees cite the ability to ship impactful code and grow with the company (from 10 to 150+ people) without losing the close-knit, human feel.
- **Benefits**: Competitive compensation, equity, fully remote or hybrid options (NYC and Nashville hubs), and a strong emphasis on work-life balance.

## Sources
1. [offchain.io/company](https://www.offchain.io/company)
2. [offchain.io/careers](https://www.offchain.io/careers)
3. [jobs.lever.co/offchainlabs](https://jobs.lever.co/offchainlabs)
4. [linkedin.com/company/offchain-labs-inc](https://linkedin.com/company/offchain-labs-inc)
5. [indexed.vc/companies/offchain](https://indexed.vc/companies/offchain)

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